Chris Hemsworth's manhood in National Lampoon reboot Vacation is threatening to overshadow the rest of the movie (as you may have noticed while watching the trailer 50 times over in slow motion – watch above again, if you must).

The 31-year-old Aussie tried on various appendages before settling on a 10-inch one because the eight-inch option "did not look that big on him", director-writer John Francis Daley told New York magazine. Thank goodness for that…

Chris now joins an elite club of stars who've put aside their shame and gone for gold with OTT prosthetics on the big screen. TheFIX takes a look at the best and worst:

1. The triple-breasted woman in Arnold Schwarzenegger's 1990 sci-fi classic Total Recall. Actress Lycia Naff told Vulture in 2012 she felt "embarrassed" filming the scene and started to cry.

No wonder she was happy to hand the torch over to Kaitlyn Leeb for the 2012 remake: "She's had to carry on with all the horny sci-fi fanboys. They're hers now!"

2. Selma Blair's oversized boobs in John Waters' 2004 comedy A Dirty Shame. They looked painful, but the effect was hilarious. Her character Caprice was nicknamed "Ursula Udders" thanks to her gigantic assets.